Recoil reducer



P. L. PORTER REcoIL REDUCER Filed July 6, 1948 Sept. 12, 1950 Percy L Porter INVENTOR.

BY m may Attorneys Patented Sept. 12, 1950 RECOIL REDUCER Percy L. Porter, Hayward, Calif.

Application July 6, 1948, Serial No. 37,182

1 Claim.

This invention relates to novel and useful improvements in attachments for use in association with certain automatically operated weapons.

An object of this invention is to reduce the recoil of various types of weapons, particularly the automatically operative type, through the utility of modifying the conventional recoil spring guide as to provide a secondar function therefor.

Another object of this invention is to provide a shock absorber in the conventional recoil spring guide of an automatic weapon and means associated with the guide for selectively adjusting the efficacy of the shock absorber.

Another object of this invention is to provide a plunger or piston within the recoil spring guide, a threaded element adjustably supplied in the said guide and a spring interposed between the threaded element and the plunger, reacting on both.

Ancillary objects and features of novelty will become more apparent to those skilled in the art, in following the description of the preferred form of the invention, illustrated in the accompanying drawings, wherein:

Figure 1 is an elevational side view of the conventional type of automatic weapon, portions being broken away in sections to illustrate the application and use of the invention, and;

Figure 2 is a longitudinal sectional view showing the actual element and elements forming the invention.

This invention has been developed in order to reduce the recoil of conventional automatic weapons. The present invention is adapted for use in many environments, particularly in weapons of the automatic type such as the Colt 38 and 45 caliber pistols.

The normal operation of this type of weapon is well known and the portions thereof which are affected by the present invention are as follows:

A frame generally indicated at I is of usual structure and has a conventional barrel I2 mounted therein. This barrel is also mounted in the usual slide l4, slidably mounted on the said frame. Upon firing of the weapon it is normal (due to the undisclosed structure) in a conventional weapon of this type that the slide 14 be actuated rearwardly, carrying with it the barrel bushing [6. This barrel bushing is pro- 2 vided at the forward end of the barrel I2 and also at the forward end of the slide [4. It is attached by means (unshown) of the locking nature engaging the inner surface of the slide I4.

This bushing has a recessed portion I8 projecting therefrom which engages an end of a hollow plug 20.

This hollow plug is also of conventional form and is slidably positioned in the frame lll. Thus, upon reciprocation of the slide I4, the hollow plug 20 will be actuated rearwardly through the The said recoil spring 22 is positioned within 7 the hollow plug, seating on the bottom thereof a l and also engages a collar 24. This collar 24 is formed with a cylindrical portion of a guide generally indicated at 26. This guide includes a sleeve having a slightl inturned portion 30 at the end opposite the said collar 24.

The said slightly inturned portion 30 forms ashoulder within the sleeve 28 operatively engageable by an enlargement 32 of a plunger or piston This plunger or piston generally indicated at 34. also includes a reduced shank 36 which projects normally exteriorly of the said sleeve 28. o

A spring 39 or other suitable equivalent resilient urging means seats within the sleeve 28, re-'- acting on the enlargement 32 and on a threaded element or member 40. This threaded element or member is actually in the form of a screw which is adjustably received in conventional threads 42 provided in the bore of the said sleeve 28. Inspection of Figure 2 clearly illustrates the adjustability of the effective compression of the spring 39 by manipulation of the threaded element All.

The said collar 24 has a dished or recessed portion 44 therein which is slidably disposed on the bottom surface of the barrel l2.

In actuation and operation the said recoil spring 22 is compressed almost entirely within the hollow plug 26, but before it reaches its maximum compression, the reduced shank 39 of the plunger 34 engages the bottom of the hollow plug. Thus, the spring 39 is compressed along with the recoil spring 22 thereby reducing the recoil of the en- 3 tire gun an appreciable amount. The mechanism within the guide 26 is actually a shock absorber serving this function.

While there has been described and illustrated but a preferred form of the invention, it is apparent that variations may be made without departing from the spirit thereof.

Having described the invention, claimed as new is:

For use in a weapon including a frame, a barrel attached to said frame, a slide mounted on said frame and said barrel, a barrel bushing attached to the end of said barrel, a hollow plug slidably mounted in said frame engaged by said bushing, and a recoil spring reacting on said plug and said frame, the improvement which comprises; a recoil spring hollow guide slidably mounted on said what is frame and barrel and a shock absorbing spring mounted in said hollow guide compressed by said hollow plug upon compression of said recoil spring, and said hollow guide having a flange at one end with a recess in said flange, the barrel having a part of its lower surface disposed in said recess.

PERCY L. PORTER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 898,038 Clarus Sept; 8, 1908 1,359,045 Fisher 'Nov. 16, 1920 1,563,675 Tansley Dec. 1, 1925 

